[time-nuts] OT - DC-10 gyros
jfor at quikus.com
Wed Mar 27 23:05:05 EDT 2013
It was almost certainly for powering a WWII vintage fluxgate compass system.
> I have a little dynamotor somewhere which makes 3 phase 400 Hz. Tiny
> thing! Only puts out like 15 VA, and not very noisy either. IIRC is was
> an "Instrument inverter"
> On 3/27/2013 9:55 PM, Bob Camp wrote:
>> If three phase is actually needed, I'd suggest something like a cheap
>> PIC with three PWM outputs. Fairly simple R/C's on the outputs should be
>> plenty good enough to filter out any crud. Good frequency stability /
>> accurate phase shift / cheap. What's not to like
>> On Mar 27, 2013, at 9:44 PM, kb0ebg at juno.com wrote:
>>> Bill Ezell;
>>> Your Gyro may require 3 phase, 400 cps, 28 vac, Sine wave.
>>> A simple "Buffered Phase Shift Oscillator" for 400 cps can create the
>>> Sine Wave.
>>> will need to add an AGC to the output for frequency stability.
>>> A "3 Phase Generator" can create the 3 phase
>>> output.https://www.circuitlab.com/circuit/m4u5nw/3-phase-generator/ Add
>>> 3 Amplifiers (one for each phase) to reach voltage/power.
>>> If the Gyro is directional, it will take several hours to stabilize.
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